The optimized formulation of chlorfenapyr 5%microemulsion(ME)was developed in terms of appearance,emulsion stability,and cold and hot storage stabilities by the inverse phase method,which involves screening of solvents,emulsifiers,antifreeze agents,and water quality.The optimized formulation of chlorfenapyr 5%ME was as follows:chlorfenapyr 5%,cyclohexanone 15%,compound emulsifier A 20%,propylene glycol 5%,and water(rest).At this optimized formulation,the performance indices of chlorfenapyr 5%ME met the requirements and have good prospects for practical applications and further development.
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